Brian Crower Stage 4 Cams for Mitsubishi 4G63 DSM Eclipse GST/GSX Engines. THIS IS THE NEW REDESIGNED STAGE 4 BC CAM FOR 2012! BETTER THAN EVER.Stage 4 - This Cam is perfect for those looking to make big power in their full race motor. This cam would be best suited in a built race engine with around 67mm or larger turbo. They will raise the powerband up to where a larger turbo can use it most efficiently. They are noticable at idle, and might sacrifice some drivability but can be managable by raising the idle. These can be used on a street car but we do suggest installing upgraded valvesprings, retainers, valves, and cam gears when using these cams. Brian Crower is a fairly new company in the Cam and Valvetrain industry, but has quickly made a name for itself for providing quality parts at a reasonable price (a concept thats hard to find in today's market.) We have tried Brian Crower Cams and Valvetrain on several applications at our own shop and they have proven themselves to be well worth the money every time. We suggest Brian Crower Cams and actually use them in some of our very own cars.